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3 years ago

Katrina ran 6 laps around a circular track that had a radius of 20 m. How far did she run?

Mathematics

1 answer:

MAVERICK [17]3 years ago

8 0

Step-by-step explanation:

Total Distance run by Katrina

$=6 \times circumference \: of \: circular \: track \\ \\ = 6 \times 2 \pi \: r \\ = 6 \times 2 \times 3.14 \times 20 \\ = 240 \times 3.14 \\ = 753.6 \: m \\$

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4x^2+4x+1=9 solutions

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Answer:

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Step-by-step explanation:

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3 years ago

Please I really need help with this question

barxatty [35]

Answer:

Step-by-step explanation:

ABC and DEF are parallel lines. So, ∠ABE and ∠BED are co interior angles.

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3 years ago

a total of $9500 is invested, part at 10% simple interest and part at 9%. if the total annual return from the two investments is

Nutka1998 [239]

a total of $9500 is invested, part at 10% simple interest and part at 9%

if the total annual return from the two investments is $914.00

Amount invested = 9500

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Interest for first part = 10 % times x = 0.10x

Remaining part invested is 9500 -x

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0.10x + 0.09(9500-x) = 914

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3 years ago

Kelsey graphed the equation y = 3x + 1 as shown below.

USPshnik [31]

Answer:

D. Kelsey graphed the slope as the y-intercept and the y-intercept as the slope.

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The equation to graph was : y= 3x + 1 where the slope is 3 and the y-intercept is 1

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m=the slope of the graph

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m=Δy/Δx

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So you can see here that in the original equation, the slope m is 3 and y-intercept is 1 as shown in the first attached graph.

While in the Kelsey's graph, the slope is 1 and the y-intercept is 3 as in the second attached graph.

Thus, the correct answer is D : Kelsey graphed the slope,3 as the y-intercept and the y-intercept,1, as the slope.

Answer choice A is incorrect because Kelsey didnot graph the y-intercept, 1 on the x-axis but graphed point (-3,0) on the x-axis.

Answer choice B is incorrect because on Kelsey's equation the y-intercept is 3 and not -3. i.e. y=1x + 3

Answer choice C is incorrect because Kelsey graphed the slope as up 1 right 1 which is okay per the equation , y=1x+3.However, this incorrect because the correct graph has a slope of 3.

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